Preheat oven to 375 degrees

Mix flour, baking soda & salt in a small bowl

Mix butter, peanut butter and vanilla in a large bowl

Mix in brown and granulated sugars to liquid mixture

Beat both eggs & add to liquid mixture

Gradually mix in flour mixture to liquid mixture

Mix in Peanut Butter M & M's

Using an ice cream scoop, drop half-scoop balls on cookie sheets (I like using parchment paper)

Bake for 10-12 minutes